Yhdenfaasisen

Yhdenfaasisen is a Finnish adjective used to describe something related to a single electrical phase, typically a power supply or electrical system that operates on one phase rather than multiple phases. The form is encountered in technical texts to specify that a installation or device uses only one phase, as opposed to multi-phase arrangements such as three-phase systems.

In everyday Finnish, the term is infrequent and not part of the standard vocabulary. More common expressions for the same idea are yksivaiheinen or yksivaiheinen järjestelmä, which are widely used in engineering, manuals, and educational materials. Because of its relative rarity, yhdenfaasisen may appear in older literature, translations, or discussions aimed at comparing single-phase and multi-phase power distribution.

The usage of yhdenfaasisen tends to be limited to contexts where authors want to emphasize the single-phase nature of a system, often in contrast to three-phase configurations. When writing for broad audiences, it is generally advisable to use the more standard terms to avoid confusion. The concept itself remains straightforward: it designates systems or components that operate on a single electrical phase rather than multiple phases.

See also: single-phase power, three-phase power, electrical distribution, vaihe (phase) in Finnish technical vocabulary.